Controlled Synthesis of a Helical Conjugated Polythiophene
Controlled Synthesis of a Helical Conjugated Polythiophene
复制标题
螺旋共轭聚噻吩的控制合成
DOI：
10.1021/acs.macromol.8b00527
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发表时间：
2018
期刊：
影响因子：
5.5
通讯作者：
G. Koeckelberghs
中科院分区：
文献类型：
--
作者：
Pieter Leysen;J. Teyssandier;S. D. Feyter;G. Koeckelberghs
为了通过活性聚合获得螺旋共轭聚合物，设计了两种新的聚合物体系：聚（3-苯撑乙烯基）噻吩（P3 PVT）和聚（3-苯基）噻吩（P3 PT）。通过Kumada催化剂转移缩合聚合（KCTCP）机理，聚合在没有转移和终止反应的情况下进行，证实了聚合的活性性质。溶剂化色性和圆二色性（CD）实验显示了P3 PVT的螺旋性质和P3 PT在不良溶剂条件下的堆积行为。制备了3-烷基取代的聚噻吩和螺旋P3 PVT的嵌段共聚物，以确定此类体系的聚集行为。溶剂化色性、CD和AFM测量表明，嵌段相互影响。如果P3 AT块在螺旋P3 PVT块组织之前堆叠，则单手螺旋形成受阻。如果螺旋形成首先发生，则堆叠行为不受影响。
Two new polymer systems, poly(3-phenylenevinylene)thiophene (P3PVT) and poly(3-phenyl)thiophene (P3PT), were designed with the aim of obtaining a helical conjugated polymer via a living polymerization. The polymerization proceeded without transfer and termination reactions via the Kumada catalyst transfer condensative polymerization (KCTCP) mechanism, confirming the living nature of the polymerization. Solvatochroism and circular dichroism (CD) experiments showed the helical nature of P3PVT and the stacking behavior of P3PT in poor solvent conditions. Block copolymers of 3-alkyl-substituted polythiophenes and helical P3PVT were prepared to determine the aggregation behavior of such systems. Solvatochroism, CD, and AFM measurements showed that the blocks influence each other’s behavior. If the P3AT block stacks before the helical P3PVT block organizes, one-handed helix formation is hindered. If helix formation occurs first, the stacking behavior is not influenced.